Sorry to spawn a new thread on the topic, but when I export closed curves to Inkscape in an .ai file they are being exploded. Is there a known way to export without this happening? I'm doing this for a laser cutter and I need the curves to stay joined!

Hi FDP, which version of Inkscape are you using? Also can you post a 3DM model file with the curve that is not being closed in Inkscape? Another thing is you might try PDF format and see if that helps any.